Background: Gait analysis using foot-mounted IMUs is a promising method to acquire gait parameters outside of laboratory settings and in everyday clinical practice. However, the need for precise sensor attachment or calibration, the requirement of environments with a homogeneous magnetic field, and the limited applicability to pathological gait patterns still pose challenges. Furthermore, in previously published work, the measurement accuracy of such systems is often only validated for specific points in time or in a single plane. Research question: This study investigates the measurement accuracy of a gait analysis method based on foot-mounted IMUs in the acquisition of the foot motion, i.e., position and angle trajectories of the foot in the sagittal, frontal, and transversal plane over the entire gait cycle. Results: A comparison of the proposed method with an optical motion capture system showed an average RMSE of 0.67◦ for pitch, 0.63◦ for roll and 1.17◦ for yaw. For position trajectories, an average RMSE of 0.51 cm for vertical lift and 0.34 cm for lateral shift was found. The measurement error of the IMU-based method is found to be much smaller than the deviations caused by the shoes. Significance: The proposed method is found to be sufficiently accurate for clinical practice. It does not require precise mounting, special calibration movements, or magnetometer data, and shows no difference in measurement accuracy between normal and pathological gait. Therefore, it provides an easy-to-use alternative to optical motion capture and facilitates gait analysis independent of laboratory settings. ; Version of record


    Access

    Download


    Export, share and cite



    Title :

    Gait & Posture / Measuring highly accurate foot position and angle trajectories with foot-mounted IMUs in clinical practice


    Contributors:

    Publication date :

    2024-01-01


    Remarks:

    system:AC17026787



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    629



    Optimal sampling frequency and bias error modeling for foot-mounted IMUs

    Munoz Diaz, Estefania / Heirich, Oliver / Khider, Mohammed et al. | IEEE | 2013


    Variable-posture foot-type robot module and variable-posture foot type robot

    ZHANG RUI / CHEN TIANXIANG | European Patent Office | 2020

    Free access

    Three-foot and four-foot mixed gait walking method for five-foot robot

    WANG BENLIN / ZHOU KAIPING / ZHAO XIAOMIN et al. | European Patent Office | 2023

    Free access

    Foot lifting gait planning method of foot type robot, controller and foot type robot

    MENG JIAN / DONG XU / XIAO PENG et al. | European Patent Office | 2022

    Free access

    Foot type motion gait planning method for four-wheel-foot robot and four-wheel-foot robot

    LUO XIN / XU ZHANHAO / CHEN JUNJIE et al. | European Patent Office | 2023

    Free access